a = ["No","Yes"]
print(a[int(input()) >= 30]) a = ["No","Yes"] a ["No","Yes"] "No" "Yes" print(a[int(input()) >= 30]) print a[int(input()) >= 30] a int(input()) >= 30 int(input()) int input() input 30 a = ["No","Yes"] ["No","Yes"] a
a = ["No","Yes"]
print(a[int(input()) >= 30])